/*
* lttng-ust-abi.c
*
- * Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
* LTTng UST ABI
*
+ * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ *
* Mimic system calls for:
* - session creation, returns an object descriptor or failure.
* - channel creation, returns an object descriptor or failure.
* - Takes an instrumentation source as parameter
* - e.g. tracepoints, dynamic_probes...
* - Takes instrumentation source specific arguments.
- *
- * Dual LGPL v2.1/GPL v2 license.
*/
#include <lttng/ust-abi.h>
+#include <lttng/ust-error.h>
#include <urcu/compiler.h>
#include <urcu/list.h>
#include <lttng/ust-events.h>
-#include <lttng/usterr-signal-safe.h>
-#include "lttng/core.h"
-#include "ltt-tracer.h"
+#include <lttng/ust-version.h>
+#include <lttng/tracepoint.h>
#include "tracepoint-internal.h"
+#include <usterr-signal-safe.h>
+#include <helper.h>
+#include "lttng-tracer.h"
-struct ltt_tracepoint_list {
- struct tracepoint_iter iter;
- int got_first;
-};
+#define OBJ_NAME_LEN 16
static int lttng_ust_abi_close_in_progress;
static
-int lttng_abi_tracepoint_list(void);
+int lttng_abi_tracepoint_list(void *owner);
+static
+int lttng_abi_tracepoint_field_list(void *owner);
/*
* Object descriptor table. Should be protected from concurrent access
void *private_data;
const struct lttng_ust_objd_ops *ops;
int f_count;
+ int owner_ref; /* has ref from owner */
+ void *owner;
+ char name[OBJ_NAME_LEN];
} s;
int freelist_next; /* offset freelist. end is -1. */
} u;
};
static
-int objd_alloc(void *private_data, const struct lttng_ust_objd_ops *ops)
+int objd_alloc(void *private_data, const struct lttng_ust_objd_ops *ops,
+ void *owner, const char *name)
{
struct lttng_ust_obj *obj;
obj->u.s.ops = ops;
obj->u.s.f_count = 2; /* count == 1 : object is allocated */
/* count == 2 : allocated + hold ref */
+ obj->u.s.owner_ref = 1; /* One owner reference */
+ obj->u.s.owner = owner;
+ strncpy(obj->u.s.name, name, OBJ_NAME_LEN);
+ obj->u.s.name[OBJ_NAME_LEN - 1] = '\0';
return obj - objd_table.array;
}
obj->u.s.f_count++;
}
-int lttng_ust_objd_unref(int id)
+int lttng_ust_objd_unref(int id, int is_owner)
{
struct lttng_ust_obj *obj = _objd_get(id);
ERR("Reference counting error\n");
return -EINVAL;
}
+ if (is_owner) {
+ if (!obj->u.s.owner_ref) {
+ ERR("Error decrementing owner reference");
+ return -EINVAL;
+ }
+ obj->u.s.owner_ref--;
+ }
if ((--obj->u.s.f_count) == 1) {
const struct lttng_ust_objd_ops *ops = objd_ops(id);
{
int i;
- for (i = 0; i < objd_table.allocated_len; i++)
- (void) lttng_ust_objd_unref(i);
+ for (i = 0; i < objd_table.allocated_len; i++) {
+ struct lttng_ust_obj *obj;
+
+ obj = _objd_get(i);
+ if (!obj)
+ continue;
+ if (!obj->u.s.owner_ref)
+ continue; /* only unref owner ref. */
+ (void) lttng_ust_objd_unref(i, 1);
+ }
free(objd_table.array);
objd_table.array = NULL;
objd_table.len = 0;
objd_table.freelist_head = -1;
}
+void lttng_ust_objd_table_owner_cleanup(void *owner)
+{
+ int i;
+
+ for (i = 0; i < objd_table.allocated_len; i++) {
+ struct lttng_ust_obj *obj;
+
+ obj = _objd_get(i);
+ if (!obj)
+ continue;
+ if (!obj->u.s.owner)
+ continue; /* skip root handles */
+ if (!obj->u.s.owner_ref)
+ continue; /* only unref owner ref. */
+ if (obj->u.s.owner == owner)
+ (void) lttng_ust_objd_unref(i, 1);
+ }
+}
+
/*
* This is LTTng's own personal way to create an ABI for sessiond.
* We send commands over a socket.
static const struct lttng_ust_objd_ops lttng_session_ops;
static const struct lttng_ust_objd_ops lttng_channel_ops;
static const struct lttng_ust_objd_ops lttng_metadata_ops;
-static const struct lttng_ust_objd_ops lttng_event_ops;
+static const struct lttng_ust_objd_ops lttng_enabler_ops;
static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops;
static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops;
+static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops;
enum channel_type {
PER_CPU_CHANNEL,
{
int root_handle;
- root_handle = objd_alloc(NULL, <tng_ops);
+ /* root handles have NULL owners */
+ root_handle = objd_alloc(NULL, <tng_ops, NULL, "root");
return root_handle;
}
static
-int lttng_abi_create_session(void)
+int lttng_abi_create_session(void *owner)
{
- struct ltt_session *session;
+ struct lttng_session *session;
int session_objd, ret;
- session = ltt_session_create();
+ session = lttng_session_create();
if (!session)
return -ENOMEM;
- session_objd = objd_alloc(session, <tng_session_ops);
+ session_objd = objd_alloc(session, <tng_session_ops, owner, "session");
if (session_objd < 0) {
ret = session_objd;
goto objd_error;
return session_objd;
objd_error:
- ltt_session_destroy(session);
+ lttng_session_destroy(session);
return ret;
}
long lttng_abi_tracer_version(int objd,
struct lttng_ust_tracer_version *v)
{
- v->version = LTTNG_UST_VERSION;
- v->patchlevel = LTTNG_UST_PATCHLEVEL;
- v->sublevel = LTTNG_UST_SUBLEVEL;
+ v->major = LTTNG_UST_INTERNAL_MAJOR_VERSION;
+ v->minor = LTTNG_UST_INTERNAL_MINOR_VERSION;
+ v->patchlevel = LTTNG_UST_INTERNAL_PATCHLEVEL_VERSION;
return 0;
}
static
long lttng_abi_add_context(int objd,
struct lttng_ust_context *context_param,
- struct lttng_ctx **ctx, struct ltt_session *session)
-{
- if (session->been_active)
- return -EPERM;
-
- switch (context_param->ctx) {
- case LTTNG_UST_CONTEXT_PTHREAD_ID:
- return lttng_add_pthread_id_to_ctx(ctx);
- case LTTNG_UST_CONTEXT_VTID:
- return lttng_add_vtid_to_ctx(ctx);
- case LTTNG_UST_CONTEXT_VPID:
- return lttng_add_vpid_to_ctx(ctx);
- case LTTNG_UST_CONTEXT_PROCNAME:
- return lttng_add_procname_to_ctx(ctx);
- default:
- return -EINVAL;
- }
+ struct lttng_ctx **ctx, struct lttng_session *session)
+{
+ return lttng_attach_context(context_param, ctx, session);
}
/**
* @objd: the object descriptor
* @cmd: the command
* @arg: command arg
+ * @uargs: UST arguments (internal)
+ * @owner: objd owner
*
* This descriptor implements lttng commands:
* LTTNG_UST_SESSION
* Returns the LTTng kernel tracer version
* LTTNG_UST_TRACEPOINT_LIST
* Returns a file descriptor listing available tracepoints
+ * LTTNG_UST_TRACEPOINT_FIELD_LIST
+ * Returns a file descriptor listing available tracepoint fields
* LTTNG_UST_WAIT_QUIESCENT
* Returns after all previously running probes have completed
*
* The returned session will be deleted when its file descriptor is closed.
*/
static
-long lttng_cmd(int objd, unsigned int cmd, unsigned long arg)
+long lttng_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
{
switch (cmd) {
case LTTNG_UST_SESSION:
- return lttng_abi_create_session();
+ return lttng_abi_create_session(owner);
case LTTNG_UST_TRACER_VERSION:
return lttng_abi_tracer_version(objd,
(struct lttng_ust_tracer_version *) arg);
case LTTNG_UST_TRACEPOINT_LIST:
- return lttng_abi_tracepoint_list();
+ return lttng_abi_tracepoint_list(owner);
+ case LTTNG_UST_TRACEPOINT_FIELD_LIST:
+ return lttng_abi_tracepoint_field_list(owner);
case LTTNG_UST_WAIT_QUIESCENT:
synchronize_trace();
return 0;
static
void lttng_metadata_create_events(int channel_objd)
{
- struct ltt_channel *channel = objd_private(channel_objd);
+ struct lttng_channel *chan = objd_private(channel_objd);
+ struct lttng_enabler *enabler;
static struct lttng_ust_event metadata_params = {
.instrumentation = LTTNG_UST_TRACEPOINT,
.name = "lttng_ust:metadata",
+ .loglevel_type = LTTNG_UST_LOGLEVEL_ALL,
+ .loglevel = TRACE_DEFAULT,
};
- struct ltt_event *event;
/*
* We tolerate no failure path after event creation. It will stay
* invariant for the rest of the session.
*/
- event = ltt_event_create(channel, &metadata_params, NULL);
- if (!event) {
+ enabler = lttng_enabler_create(LTTNG_ENABLER_EVENT,
+ &metadata_params, chan);
+ if (!enabler) {
goto create_error;
}
return;
int lttng_abi_create_channel(int session_objd,
struct lttng_ust_channel *chan_param,
- enum channel_type channel_type)
+ enum channel_type channel_type,
+ union ust_args *uargs,
+ void *owner)
{
- struct ltt_session *session = objd_private(session_objd);
+ struct lttng_session *session = objd_private(session_objd);
const struct lttng_ust_objd_ops *ops;
const char *transport_name;
- struct ltt_channel *chan;
+ struct lttng_channel *chan;
int chan_objd;
int ret = 0;
- struct ltt_channel chan_priv_init;
+ struct lttng_channel chan_priv_init;
switch (channel_type) {
case PER_CPU_CHANNEL:
transport_name = "<unknown>";
return -EINVAL;
}
- chan_objd = objd_alloc(NULL, ops);
+ chan_objd = objd_alloc(NULL, ops, owner, "channel");
if (chan_objd < 0) {
ret = chan_objd;
goto objd_error;
* We tolerate no failure path after channel creation. It will stay
* invariant for the rest of the session.
*/
- chan = ltt_channel_create(session, transport_name, NULL,
+ chan = lttng_channel_create(session, transport_name, NULL,
chan_param->subbuf_size,
chan_param->num_subbuf,
chan_param->switch_timer_interval,
chan_param->read_timer_interval,
- &chan_param->shm_fd,
- &chan_param->wait_fd,
- &chan_param->memory_map_size,
+ &uargs->channel.shm_fd,
+ &uargs->channel.wait_fd,
+ &uargs->channel.memory_map_size,
&chan_priv_init);
if (!chan) {
ret = -EINVAL;
{
int err;
- err = lttng_ust_objd_unref(chan_objd);
+ err = lttng_ust_objd_unref(chan_objd, 1);
assert(!err);
}
objd_error:
* @obj: the object
* @cmd: the command
* @arg: command arg
+ * @uargs: UST arguments (internal)
+ * @owner: objd owner
*
* This descriptor implements lttng commands:
* LTTNG_UST_CHANNEL
* The returned channel will be deleted when its file descriptor is closed.
*/
static
-long lttng_session_cmd(int objd, unsigned int cmd, unsigned long arg)
+long lttng_session_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
{
- struct ltt_session *session = objd_private(objd);
+ struct lttng_session *session = objd_private(objd);
switch (cmd) {
case LTTNG_UST_CHANNEL:
return lttng_abi_create_channel(objd,
(struct lttng_ust_channel *) arg,
- PER_CPU_CHANNEL);
+ PER_CPU_CHANNEL, uargs, owner);
case LTTNG_UST_SESSION_START:
case LTTNG_UST_ENABLE:
- return ltt_session_enable(session);
+ return lttng_session_enable(session);
case LTTNG_UST_SESSION_STOP:
case LTTNG_UST_DISABLE:
- return ltt_session_disable(session);
+ return lttng_session_disable(session);
case LTTNG_UST_METADATA:
return lttng_abi_create_channel(objd,
(struct lttng_ust_channel *) arg,
- METADATA_CHANNEL);
+ METADATA_CHANNEL, uargs, owner);
default:
return -EINVAL;
}
static
int lttng_release_session(int objd)
{
- struct ltt_session *session = objd_private(objd);
+ struct lttng_session *session = objd_private(objd);
if (session) {
- ltt_session_destroy(session);
+ lttng_session_destroy(session);
return 0;
} else {
return -EINVAL;
.cmd = lttng_session_cmd,
};
-/*
- * beware: we don't keep the mutex over the send, but we must walk the
- * whole list each time we are called again. So sending one tracepoint
- * at a time means this is O(n^2). TODO: do as in the kernel and send
- * multiple tracepoints for each call to amortize this cost.
- */
-static
-void ltt_tracepoint_list_get(struct ltt_tracepoint_list *list,
- char *tp_list_entry)
-{
-next:
- if (!list->got_first) {
- tracepoint_iter_start(&list->iter);
- list->got_first = 1;
- goto copy;
- }
- tracepoint_iter_next(&list->iter);
-copy:
- if (!list->iter.tracepoint) {
- tp_list_entry[0] = '\0'; /* end of list */
- } else {
- if (!strcmp((*list->iter.tracepoint)->name,
- "lttng_ust:metadata"))
- goto next;
- memcpy(tp_list_entry, (*list->iter.tracepoint)->name,
- LTTNG_UST_SYM_NAME_LEN);
- }
-}
-
static
-long lttng_tracepoint_list_cmd(int objd, unsigned int cmd, unsigned long arg)
+long lttng_tracepoint_list_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
{
- struct ltt_tracepoint_list *list = objd_private(objd);
- char *str = (char *) arg;
+ struct lttng_ust_tracepoint_list *list = objd_private(objd);
+ struct lttng_ust_tracepoint_iter *tp =
+ (struct lttng_ust_tracepoint_iter *) arg;
+ struct lttng_ust_tracepoint_iter *iter;
switch (cmd) {
case LTTNG_UST_TRACEPOINT_LIST_GET:
- ltt_tracepoint_list_get(list, str);
- if (str[0] == '\0')
- return -ENOENT;
+ {
+ retry:
+ iter = lttng_ust_tracepoint_list_get_iter_next(list);
+ if (!iter)
+ return -LTTNG_UST_ERR_NOENT;
+ if (!strcmp(iter->name, "lttng_ust:metadata"))
+ goto retry;
+ memcpy(tp, iter, sizeof(*tp));
return 0;
+ }
default:
return -EINVAL;
}
}
static
-int lttng_abi_tracepoint_list(void)
+int lttng_abi_tracepoint_list(void *owner)
{
int list_objd, ret;
- struct ltt_tracepoint_list *list;
+ struct lttng_ust_tracepoint_list *list;
- list_objd = objd_alloc(NULL, <tng_tracepoint_list_ops);
+ list_objd = objd_alloc(NULL, <tng_tracepoint_list_ops, owner, "tp_list");
if (list_objd < 0) {
ret = list_objd;
goto objd_error;
}
objd_set_private(list_objd, list);
+ /* populate list by walking on all registered probes. */
+ ret = lttng_probes_get_event_list(list);
+ if (ret) {
+ goto list_error;
+ }
return list_objd;
+list_error:
+ free(list);
alloc_error:
{
int err;
- err = lttng_ust_objd_unref(list_objd);
+ err = lttng_ust_objd_unref(list_objd, 1);
assert(!err);
}
objd_error:
static
int lttng_release_tracepoint_list(int objd)
{
- struct ltt_tracepoint_list *list = objd_private(objd);
+ struct lttng_ust_tracepoint_list *list = objd_private(objd);
if (list) {
- tracepoint_iter_stop(&list->iter);
+ lttng_probes_prune_event_list(list);
free(list);
return 0;
} else {
.cmd = lttng_tracepoint_list_cmd,
};
+static
+long lttng_tracepoint_field_list_cmd(int objd, unsigned int cmd,
+ unsigned long arg, union ust_args *uargs, void *owner)
+{
+ struct lttng_ust_field_list *list = objd_private(objd);
+ struct lttng_ust_field_iter *tp = &uargs->field_list.entry;
+ struct lttng_ust_field_iter *iter;
+
+ switch (cmd) {
+ case LTTNG_UST_TRACEPOINT_FIELD_LIST_GET:
+ {
+ retry:
+ iter = lttng_ust_field_list_get_iter_next(list);
+ if (!iter)
+ return -LTTNG_UST_ERR_NOENT;
+ if (!strcmp(iter->event_name, "lttng_ust:metadata"))
+ goto retry;
+ memcpy(tp, iter, sizeof(*tp));
+ return 0;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static
+int lttng_abi_tracepoint_field_list(void *owner)
+{
+ int list_objd, ret;
+ struct lttng_ust_field_list *list;
+
+ list_objd = objd_alloc(NULL, <tng_tracepoint_field_list_ops, owner,
+ "tp_field_list");
+ if (list_objd < 0) {
+ ret = list_objd;
+ goto objd_error;
+ }
+ list = zmalloc(sizeof(*list));
+ if (!list) {
+ ret = -ENOMEM;
+ goto alloc_error;
+ }
+ objd_set_private(list_objd, list);
+
+ /* populate list by walking on all registered probes. */
+ ret = lttng_probes_get_field_list(list);
+ if (ret) {
+ goto list_error;
+ }
+ return list_objd;
+
+list_error:
+ free(list);
+alloc_error:
+ {
+ int err;
+
+ err = lttng_ust_objd_unref(list_objd, 1);
+ assert(!err);
+ }
+objd_error:
+ return ret;
+}
+
+static
+int lttng_release_tracepoint_field_list(int objd)
+{
+ struct lttng_ust_field_list *list = objd_private(objd);
+
+ if (list) {
+ lttng_probes_prune_field_list(list);
+ free(list);
+ return 0;
+ } else {
+ return -EINVAL;
+ }
+}
+
+static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops = {
+ .release = lttng_release_tracepoint_field_list,
+ .cmd = lttng_tracepoint_field_list_cmd,
+};
+
struct stream_priv_data {
struct lttng_ust_lib_ring_buffer *buf;
- struct ltt_channel *ltt_chan;
+ struct lttng_channel *lttng_chan;
};
static
-int lttng_abi_open_stream(int channel_objd, struct lttng_ust_stream *info)
+int lttng_abi_open_stream(int channel_objd, struct lttng_ust_stream *info,
+ union ust_args *uargs, void *owner)
{
- struct ltt_channel *channel = objd_private(channel_objd);
+ struct lttng_channel *channel = objd_private(channel_objd);
struct lttng_ust_lib_ring_buffer *buf;
struct stream_priv_data *priv;
int stream_objd, ret;
buf = channel->ops->buffer_read_open(channel->chan, channel->handle,
- &info->shm_fd, &info->wait_fd, &info->memory_map_size);
+ &uargs->stream.shm_fd,
+ &uargs->stream.wait_fd,
+ &uargs->stream.memory_map_size);
if (!buf)
return -ENOENT;
goto alloc_error;
}
priv->buf = buf;
- priv->ltt_chan = channel;
- stream_objd = objd_alloc(priv, &lib_ring_buffer_objd_ops);
+ priv->lttng_chan = channel;
+ stream_objd = objd_alloc(priv, &lib_ring_buffer_objd_ops, owner, "open_stream");
if (stream_objd < 0) {
ret = stream_objd;
goto objd_error;
}
static
-int lttng_abi_create_event(int channel_objd,
- struct lttng_ust_event *event_param)
+int lttng_abi_create_enabler(int channel_objd,
+ struct lttng_ust_event *event_param,
+ void *owner,
+ enum lttng_enabler_type type)
{
- struct ltt_channel *channel = objd_private(channel_objd);
- struct ltt_event *event;
+ struct lttng_channel *channel = objd_private(channel_objd);
+ struct lttng_enabler *enabler;
int event_objd, ret;
event_param->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
- event_objd = objd_alloc(NULL, <tng_event_ops);
+ event_objd = objd_alloc(NULL, <tng_enabler_ops, owner, "enabler");
if (event_objd < 0) {
ret = event_objd;
goto objd_error;
* We tolerate no failure path after event creation. It will stay
* invariant for the rest of the session.
*/
- event = ltt_event_create(channel, event_param, NULL);
- if (!event) {
- ret = -EINVAL;
+ enabler = lttng_enabler_create(type, event_param, channel);
+ if (!enabler) {
+ ret = -ENOMEM;
goto event_error;
}
- objd_set_private(event_objd, event);
+ objd_set_private(event_objd, enabler);
/* The event holds a reference on the channel */
objd_ref(channel_objd);
return event_objd;
{
int err;
- err = lttng_ust_objd_unref(event_objd);
+ err = lttng_ust_objd_unref(event_objd, 1);
assert(!err);
}
objd_error:
* @objd: the object descriptor
* @cmd: the command
* @arg: command arg
+ * @uargs: UST arguments (internal)
+ * @owner: objd owner
*
* This object descriptor implements lttng commands:
* LTTNG_UST_STREAM
* Channel and event file descriptors also hold a reference on the session.
*/
static
-long lttng_channel_cmd(int objd, unsigned int cmd, unsigned long arg)
+long lttng_channel_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
{
- struct ltt_channel *channel = objd_private(objd);
+ struct lttng_channel *channel = objd_private(objd);
switch (cmd) {
case LTTNG_UST_STREAM:
stream = (struct lttng_ust_stream *) arg;
/* stream used as output */
- return lttng_abi_open_stream(objd, stream);
+ return lttng_abi_open_stream(objd, stream, uargs, owner);
}
case LTTNG_UST_EVENT:
- return lttng_abi_create_event(objd, (struct lttng_ust_event *) arg);
+ {
+ struct lttng_ust_event *event_param =
+ (struct lttng_ust_event *) arg;
+ if (event_param->name[strlen(event_param->name) - 1] == '*') {
+ /* If ends with wildcard, create wildcard. */
+ return lttng_abi_create_enabler(objd, event_param,
+ owner, LTTNG_ENABLER_WILDCARD);
+ } else {
+ return lttng_abi_create_enabler(objd, event_param,
+ owner, LTTNG_ENABLER_EVENT);
+ }
+ }
case LTTNG_UST_CONTEXT:
return lttng_abi_add_context(objd,
(struct lttng_ust_context *) arg,
&channel->ctx, channel->session);
case LTTNG_UST_ENABLE:
- return ltt_channel_enable(channel);
+ return lttng_channel_enable(channel);
case LTTNG_UST_DISABLE:
- return ltt_channel_disable(channel);
+ return lttng_channel_disable(channel);
case LTTNG_UST_FLUSH_BUFFER:
return channel->ops->flush_buffer(channel->chan, channel->handle);
default:
* @objd: the object descriptor
* @cmd: the command
* @arg: command arg
+ * @uargs: UST arguments (internal)
+ * @owner: objd owner
*
* This object descriptor implements lttng commands:
* LTTNG_UST_STREAM
* Channel and event file descriptors also hold a reference on the session.
*/
static
-long lttng_metadata_cmd(int objd, unsigned int cmd, unsigned long arg)
+long lttng_metadata_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
{
- struct ltt_channel *channel = objd_private(objd);
+ struct lttng_channel *channel = objd_private(objd);
switch (cmd) {
case LTTNG_UST_STREAM:
stream = (struct lttng_ust_stream *) arg;
/* stream used as output */
- return lttng_abi_open_stream(objd, stream);
+ return lttng_abi_open_stream(objd, stream, uargs, owner);
}
case LTTNG_UST_FLUSH_BUFFER:
return channel->ops->flush_buffer(channel->chan, channel->handle);
}
}
-#if 0
-/**
- * lttng_channel_poll - lttng stream addition/removal monitoring
- *
- * @file: the file
- * @wait: poll table
- */
-unsigned int lttng_channel_poll(struct file *file, poll_table *wait)
-{
- struct ltt_channel *channel = file->private_data;
- unsigned int mask = 0;
-
- if (file->f_mode & FMODE_READ) {
- poll_wait_set_exclusive(wait);
- poll_wait(file, channel->ops->get_hp_wait_queue(channel->chan),
- wait);
-
- if (channel->ops->is_disabled(channel->chan))
- return POLLERR;
- if (channel->ops->is_finalized(channel->chan))
- return POLLHUP;
- if (channel->ops->buffer_has_read_closed_stream(channel->chan))
- return POLLIN | POLLRDNORM;
- return 0;
- }
- return mask;
-
-}
-#endif //0
-
static
int lttng_channel_release(int objd)
{
- struct ltt_channel *channel = objd_private(objd);
+ struct lttng_channel *channel = objd_private(objd);
if (channel)
- return lttng_ust_objd_unref(channel->session->objd);
+ return lttng_ust_objd_unref(channel->session->objd, 0);
return 0;
}
static const struct lttng_ust_objd_ops lttng_channel_ops = {
.release = lttng_channel_release,
- //.poll = lttng_channel_poll,
.cmd = lttng_channel_cmd,
};
* @objd: the object descriptor
* @cmd: the command
* @arg: command arg
+ * @uargs: UST arguments (internal)
+ * @owner: objd owner
*
* This object descriptor implements lttng commands:
* (None for now. Access is done directly though shm.)
*/
static
-long lttng_rb_cmd(int objd, unsigned int cmd, unsigned long arg)
+long lttng_rb_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
{
switch (cmd) {
default:
{
struct stream_priv_data *priv = objd_private(objd);
struct lttng_ust_lib_ring_buffer *buf;
- struct ltt_channel *channel;
+ struct lttng_channel *channel;
if (priv) {
buf = priv->buf;
- channel = priv->ltt_chan;
+ channel = priv->lttng_chan;
free(priv);
/*
* If we are at ABI exit, we don't want to close the
if (!lttng_ust_abi_close_in_progress)
channel->ops->buffer_read_close(buf, channel->handle);
- return lttng_ust_objd_unref(channel->objd);
+ return lttng_ust_objd_unref(channel->objd, 0);
}
return 0;
}
};
/**
- * lttng_event_cmd - lttng control through object descriptors
+ * lttng_enabler_cmd - lttng control through object descriptors
*
* @objd: the object descriptor
* @cmd: the command
* @arg: command arg
+ * @uargs: UST arguments (internal)
+ * @owner: objd owner
*
* This object descriptor implements lttng commands:
* LTTNG_UST_CONTEXT
- * Prepend a context field to each record of this event
+ * Prepend a context field to each record of events of this
+ * enabler.
* LTTNG_UST_ENABLE
- * Enable recording for this event (weak enable)
+ * Enable recording for this enabler
* LTTNG_UST_DISABLE
- * Disable recording for this event (strong disable)
+ * Disable recording for this enabler
+ * LTTNG_UST_FILTER
+ * Attach a filter to an enabler.
*/
static
-long lttng_event_cmd(int objd, unsigned int cmd, unsigned long arg)
+long lttng_enabler_cmd(int objd, unsigned int cmd, unsigned long arg,
+ union ust_args *uargs, void *owner)
{
- struct ltt_event *event = objd_private(objd);
+ struct lttng_enabler *enabler = objd_private(objd);
switch (cmd) {
case LTTNG_UST_CONTEXT:
- return lttng_abi_add_context(objd,
- (struct lttng_ust_context *) arg,
- &event->ctx, event->chan->session);
+ return lttng_enabler_attach_context(enabler,
+ (struct lttng_ust_context *) arg);
case LTTNG_UST_ENABLE:
- return ltt_event_enable(event);
+ return lttng_enabler_enable(enabler);
case LTTNG_UST_DISABLE:
- return ltt_event_disable(event);
+ return lttng_enabler_disable(enabler);
+ case LTTNG_UST_FILTER:
+ {
+ int ret;
+
+ ret = lttng_enabler_attach_bytecode(enabler,
+ (struct lttng_ust_filter_bytecode_node *) arg);
+ if (ret)
+ return ret;
+ return 0;
+ }
default:
return -EINVAL;
}
}
static
-int lttng_event_release(int objd)
+int lttng_enabler_release(int objd)
{
- struct ltt_event *event = objd_private(objd);
+ struct lttng_enabler *enabler = objd_private(objd);
- if (event)
- return lttng_ust_objd_unref(event->chan->objd);
+ if (enabler)
+ return lttng_ust_objd_unref(enabler->chan->objd, 0);
return 0;
}
-/* TODO: filter control ioctl */
-static const struct lttng_ust_objd_ops lttng_event_ops = {
- .release = lttng_event_release,
- .cmd = lttng_event_cmd,
+static const struct lttng_ust_objd_ops lttng_enabler_ops = {
+ .release = lttng_enabler_release,
+ .cmd = lttng_enabler_cmd,
};
void lttng_ust_abi_exit(void)
projects / lttng-ust.git / blobdiff